Investor Presentaiton

Highly Diversified Business Model Across Customer Segments, Geographies and Industries Customer Segments LTM Billings – Q3'21 ($3,837M) - Geographies W II m 26% 26% 48% Enterprise and SP/MSSP SMB ■Mid-Enterprise Industries 9% 10% 26% 100+ Other Industries Countries 12% 38% 49% United States Japan Germany Canada France United Kingdom Note: Billings data is derived from invoiced amounts. O Fortinet, Inc. All Rights Reserved. 14% 17% ■Government Financial Services SP/MSSP ■Technology ■Retail/Hospitality 28 88

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